Bis(2,2'-bipyrid-yl)-1κN,N';3κN,N'-bis-(4-bromo-2-formyl-phenolato)-1κO,O';3κO,O'-bis-[μ-2-(5-bromo-2-oxidobenzylidene-amino)-ethane-sul-fon-ato]-1:2κO:N,O;2:3κN,O:O-tricopper(II) monohydrate.

The title complex, [Cu(3)(C(9)H(8)BrNO(4)S)(2)(C(7)H(4)BrO(2))(2)(C(10)H(8)N(2))(2)]·H(2)O, lies on an inversion center located on the central Cu atom, which is four-coordinated in a square-planar geometry, whereas the outer Cu atoms related by symmetry are five-coordinated in a square-pyramidal geometry. The trinuclear mol-ecules, with an intramolecular Cu⋯Cu separation of 6.313 (3) Å, are linked to each other, forming a chain through O-H⋯O and O-H⋯Br hydrogen bonds involving the half-occupied water mol-ecule. Futhermore, weak C-H⋯O inter-actions link the chains to form a supra-molecular network.